Earlier this month the still-incomplete Burj Dubai building in Dubai officially surpassed the height of all other buildings, towers and masts worldwide, making it the tallest man-made structure on the planet. Currently standing at a staggering 688 m, construction of Burj Dubai is set to continue for another year, and the final height will not be announced until the building opens in September 2009. As you can see, the Google Earth image was taken while the building was still just a toddler, but you can get an idea of how it might look with a 3D model. Before…